Received: 4 May 2021
Accepted: 22 September 2021
First Online: 2 October 2021
: The requirement for ethical approval and informed consent was waived because of the nature of the meta-analysis.
: All authors read and approved the final version of the manuscript. All authors agree with the present state of authorship and have signed a statement attesting to authorship.
: The authors declare that there are no competing interests.